Kiyonori Tokuno

This inventor holds 14 USPTO granted patents and 4 published patent applications, plus 6 CIPO patents and 9 EPO patents. Top assignees: Nippon Steel Sumitomo Metal Corporation, Nippon Steel Corporation. Active years: 2005-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyonori Tokuno. Retrieved from https://idiyas.com/inventor/kiyonori-tokuno

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 14 (Patent Applications = 4)

% Patents Active = 71.4

CIPO Patents = 6

EPO Patents = 9 (Patent Applications = 12)

Average Co-Inventor Count = 5.6

ph-index = 3

Forward Citations = 37(Granted Patents)

Location History:

Chiyoda-ku, JP (2009)
Tokyo, JP (2005 - 2023)

Company Filing History:

10 out of 1,102

Nippon Steel Sumitomo Metal Corporation

patents

4 out of 3,713

Nippon Steel Corporation

patents

Years Active: 2005-2023

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11760887 - Titanium material (2023-09-19),

2. 10305119 - Titanium material or titanium alloy material having surface electrical conductivity and method for producing the same, and fuel cell separator and fuel cell using the same (2019-05-28),

3. 10074857 - Titanium or titanium alloy material for fuel cell separator having high contact conductivity with carbon and high durability, fuel cell separator including the same, and manufacturing method therefor (2018-09-11),

4. 10033052 - Titanium material or titanium alloy material having surface electrical conductivity, and fuel cell separator and fuel cell using the same (2018-07-24),

5. 9947942 - Titanium material or titanium alloy material for fuel cell separator having high contact conductivity with carbon and high durability, fuel cell separator including the same, and fuel cell (2018-04-17),

6. 9885102 - Colored pure titanium or titanium alloy having low susceptibility to discoloration in atmospheric environment (2018-02-06),

7. 9065081 - Titanium material for solid polymer fuel cell separator use and method of production of same (2015-06-23),

8. 9011976 - Titanium sheet covered with protective film superior in high temperature oxidation resistance and high temperature salt damage resistance, automobile exhaust system using same, and methods of production of same (2015-04-21),

9. 8865612 - Titanium-based material having visible light response and excellent in photocatalytic activity and method of production of same (2014-10-21),

10. 8785031 - Polymer electrolyte fuel cell separator made of pure titanium or titanium alloy and method of production of same (2014-07-22),

11. 8603268 - Titanium material for solid polymer fuel cell separator having low contact resistance and method of production of same (2013-12-10),

12. 7594973 - Titanium material less susceptible to discoloration and method for production thereof (2009-09-29),

13. 7547671 - Discoloration removal cleaning agent for titanium and titanium alloy building materials, and discoloration removal cleaning method (2009-06-16),

14. 6863987 - Titanium resistant to discoloration in atmospheric environment and process of production of same (2005-03-08),

Title: Kiyonori Tokuno: Innovator in Titanium Materials

Introduction

Kiyonori Tokuno is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced titanium materials. With a total of 14 patents to his name, Tokuno's work has garnered attention for its innovative approaches and practical applications.

Latest Patents

One of Tokuno's latest patents focuses on a titanium material that includes a titanium oxide layer formed on the surface of titanium as a base material. This titanium oxide layer has a thickness measured by glow discharge spectrometry ranging from 60 to 300 nm. The layer contains 0.5 to 7.0 at % of nitrogen, and the arithmetic mean roughness Ra of the surface is between 2.0 to 4.0 µm. Additionally, the power spectrum of the surface roughness exhibits specific amplitude heights in defined wavelength ranges. Another notable patent involves a titanium material or titanium alloy material that features surface electrical conductivity, along with a method for producing such materials. This innovation is particularly relevant for fuel cell applications, providing good contact-to-carbon electrical conductivity and durability.

Career Highlights

Throughout his career, Kiyonori Tokuno has worked with leading companies in the industry, including Nippon Steel & Sumitomo Metal Corporation and Nippon Steel Corporation. His experience in these organizations has allowed him to refine his expertise in materials engineering and contribute to groundbreaking advancements in titanium technology.

Collaborations

Tokuno has collaborated with notable colleagues in his field, including Michio Kaneko and Kazuhiro Takahashi. These partnerships have facilitated the exchange of ideas and fostered innovation in their respective projects.

Conclusion

Kiyonori Tokuno's contributions to the field of titanium materials exemplify the impact of innovative thinking in engineering. His patents reflect a commitment to advancing technology and improving material properties for various applications. Through his work, Tokuno continues to influence the landscape of materials science and engineering.

Profile summary based on public USPTO records.